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Farmall & IHC Tractors Discussion Forum
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SMTA Mystery Bearing

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GordoSD

07-24-2005 06:24:26




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I just drained the tranny/diff on my new SMTA. There was a pretty fair amount of metal granules in the fluid. So I went fishing in the rear outlet with a telescoping magnet. Well I found 6 pieces of what looks like a ball bearing race. Balls would be about 5/16 inch diameter, and the cage maybe 2 1/2 inches?. Magnet also came out looking like a porcupine. No sign of the balls. What bearing has disintegrated? I do have all gears and reverse. But, when braking the left rear wheel/axle seems to stutter or wobble a little. Can I fix anything by removing the PTO unit, or do I get to pull the tranny cover? How many hours to get that top plate off?

Gordo

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lee

07-24-2005 17:45:35




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 Re: SMTA Mystery Bearing in reply to GordoSD, 07-24-2005 06:24:26  
I would put the pinion and bevel gears right back where they were as regards the shims and backlash. Don't try to correct the backlash back too specs. You'll put the gears out of the wear pattern and likely doom the gears to howling or worse to failure. If the gears are excessive worn they need replaced.



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the tractor vet

07-24-2005 18:07:19




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 Re: SMTA Mystery Bearing in reply to lee, 07-24-2005 17:45:35  
Pinion depth is the biggy to worry about as for back lash as long as ya got some you will be fine . If you have done as many rear end set up as i have over the years you would know what i am telling you . If ya want a fun rear end to set up do a 10 and a quater Sterling in a ford with out the set up tools and people complain about doing a Dana childs play My old 88 Ford 350 ate the startor ring for the anti lock brake and for some reason it had to go thru the ring and pinion And why would i want to pay some bone head at the dealer to do it for me well that was at 70000 miles and when i sold the truck with 287000 miles of trailer pulling it was still going strong . My one buddy had the pinion bearing go out on his 766 and we could not get one so i put a ring and pinion out of a used 806 and set it up to the new specs and adjuted the back lash and that was 25 years ago and two engines and a T/A later and still going and sounds like a new one .

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GordoSD

07-24-2005 10:12:13




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 Re: SMTA Mystery Bearing in reply to GordoSD, 07-24-2005 06:24:26  
IF this a a "good news-bad news" joke where is the good news? Watch for SMTA for sale ad! I replaced the bull gear in the H so I guess I can do another one. Kinda wanted to get that left rear wheel and tire out of the way anyhow. Also saw that one front inner wheel is broken around one of the mounting holes. Anyone have a "Z" code, SMTA front wheel?

Gordo



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Marv

07-24-2005 08:52:48




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 Re: SMTA Mystery Bearing in reply to GordoSD, 07-24-2005 06:24:26  
I had a similar problem with my SMTA. The previous owner did not change the oil and a few bearings were ruined. Since the transmission and rear end share the same oil, I removed the tranny deck to examine and flush the entire system. As mentioned by Tractor Vet, all bearings and gears are suspect at this point. Brace yourself when you purchase the axel bearings. My local CaseIH dealer priced them to me at $150.00 per bearing. Good luck. Marv

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P Backus

07-24-2005 10:29:30




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 Re: SMTA Mystery Bearing in reply to Marv, 07-24-2005 08:52:48  
I have found that on expensive bearings like that you can often save a significant amount of money by taking the number off the old bearing and getting a new one from Motion Industries. I think that they are nation wide and can match any bearing. IH didn"t make their own special bearings, they are all industry standard bearings, so they can get OEM quality bearings for you. Sometimes it can be half the price. Where does CIH get the bearings from? Same place as Motion Industries.
Paul

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the tractor vet

07-24-2005 09:28:07




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 Re: SMTA Mystery Bearing in reply to Marv, 07-24-2005 08:52:48  
Yep and that is the only place i have found them , if ya want to play ya got to pay.



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riverbend

07-24-2005 06:46:06




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 Re: SMTA Mystery Bearing in reply to GordoSD, 07-24-2005 06:24:26  
Take the top cover off. All those metal particles have circulated through all your bearings. Granted, they are not journal bearings, but how often do you want to open it up to replace another bad bearing ?

It took about 8 hours to remove the top cover, replace the pilot bearing and put it all back together. You might consider sticking a little magnet to the backside of the drain plug when you are done.

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the tractor vet

07-24-2005 06:55:36




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 Re: SMTA Mystery Bearing in reply to riverbend, 07-24-2005 06:46:06  
What he has to do can all be done with out taking the top off . and can be acomplished in half the time now if ya want to replace all the bearing then she need to be stripped to the rinning gears of a KittyDID .or to bear case and start from scratch and that means re setting of the ring and pinion . 4 bull pinion bearing and 4 axel bearing and a couple seal and gskt. and he will be good to go .



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riverbend

07-24-2005 14:49:36




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 Re: SMTA Mystery Bearing in reply to the tractor vet, 07-24-2005 06:55:36  
If the SM transmission is a similar design to the M, where it can pick up a loose ball bearing, I would want to look for chipped gears. If there was one, the other gear might be damaged, and either shaft could be bent.

I would be more concerned about the metal chips and paste grinding on the bearings. The bull pinion bearings went out on my H. Two years after that, the pilot bearing died.

As far as the shimming, clean everything so you could eat off it, and put the shims back where they came from. Check it. The IH manual covers that job pretty well.

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the tractor vet

07-24-2005 17:55:14




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 Re: SMTA Mystery Bearing in reply to riverbend, 07-24-2005 14:49:36  
Anytime you change bearings on a ring and pinion you had best be checking set up as bearing arenot always the same and can change the set up you may not see it but it is there . The balls that he was talken about were from the bull pinions as the axel bearings are larger. If the rear end was the also used as the hdy. resivor then i would be a littel more worried about how clean it was . The best cure is to put a couple flat COW magnets in the rear between the bull gears and after a year or so pull the PTO and clean the magnets

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the tractor vet

07-24-2005 06:45:57




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 Re: SMTA Mystery Bearing in reply to GordoSD, 07-24-2005 06:24:26  
Well i would start by pulling the PTO and dropping the bull gears then the axels then the brakes and bull pinions , I would have to say a bull pinion bearing is bad but since it is and older tractor i would replace all axel and bull pinion bearings and be done with it . I did that with mine as i had a bad axel bearing and i only wanted to go in there once now mine is done and unless one of the new bearings fail it should out last me . I also did my super H as it had bad axel bearings also.

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